while matching, ignore exceptions thrown by cast_to constructors

jio.js

@@ -4773,8 +4773,17 @@ SimpleQuery.prototype.match = function (item) {
         cast_to = this._key_schema.cast_lookup[cast_to];
       }
 
+      try {
         value = cast_to(value);
+      } catch (e) {
+        value = undefined;
+      }
+
+      try {
         object_value = cast_to(object_value);
+      } catch (e) {
+        object_value = undefined;
+      }
     }
   } else {
     object_value = item[key];

src/queries/core/simplequery.js

@@ -159,8 +159,17 @@ SimpleQuery.prototype.match = function (item) {
         cast_to = this._key_schema.cast_lookup[cast_to];
       }
 
+      try {
         value = cast_to(value);
+      } catch (e) {
+        value = undefined;
+      }
+
+      try {
         object_value = cast_to(object_value);
+      } catch (e) {
+        object_value = undefined;
+      }
     }
   } else {
     object_value = item[key];

test/queries/key.tests.js

@@ -130,6 +130,10 @@
         read_from: 'date',
         cast_to: dateCast,
         equal_match: sameYear
+      },
+      broken: {
+        read_from: 'date',
+        cast_to: function () { throw new Error('Broken!'); }
       }
     };
 
@@ -178,6 +182,19 @@
         })
     );
 
+    promise.push(
+      jIO.QueryFactory.create({
+        type: 'simple',
+        key: keys.broken,
+        value: '2013-02-10'
+      }).
+        exec(docList()).
+        then(function (dl) {
+          deepEqual(dl.length, 0,
+                    'Constructors that throw exceptions should not break a query, but silently fail comparisons');
+        })
+    );
+
     RSVP.all(promise).then(noop).always(start);
   });